the five kinds of paradox
19:30
el ahorcado es un juego raro
28:47
there are 48 regular polyhedra
18:34
a defense of the imperial measurement system
19:33
The Paradox of Time Travel Paradoxes
24:14
The Banach–Tarski Paradox
17:59
The Paradox of Being a Good Person - George Orwell's Warning to the World
17:54
Cicada 3301: An Internet Mystery
18:01